Observations of hysteresis in solar cycle variations among seven solar activity indicators

Details Observations of hysteresis in solar cycle variations among seven solar activity indicators Observations of hysteresis in solar cycle variations among seven solar activity indicators

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..150..347b&link_type=abstract

Solar Physics, vol. 150, no. 1-2, p. 347-357

Astronomy and Astrophysics

Astronomy

23

Hysteresis, Phase Shift, Radio Astronomy, Solar Activity, Solar Corona, Solar Cycles, Solar Magnetic Field, Solar Radio Emission, Sunspots, Time Lag, Ultraviolet Astronomy, Ultraviolet Emission, Variations, Electron Energy, Flux (Rate), Flux Density, Lissajous Figures, Lyman Alpha Radiation, Nimbus 7 Satellite, Noaa 9 Satellite, Solar Electrons, Time Series Analysis

Scientific paper

We show that smoothed time series of 7 indices of solar activity exhibit significant solar cycle dependent differences in their relative variations during the past 20 years. In some cases these observed hysteresis patterns start to repeat over more than one solar cycle, giving evidence that this is a normal feature of solar variability. Among the indices we study, we find that the hysteresis effects are approximately simple phase shifts, and we quantify these phase shifts in terms of lag times behind the leading index, the International Sunspot Number. Our measured lag times range from less than one month to greater than four months and can be much larger than lag times estimated from short-term variations of these same activity indices during the emergence and decay of major active regions. We argue that hysteresis represents a real delay in the onset and decline of solar activity and is an important clue in the search for physical processes responsible for changing solar emission at various wavelengths.

Affiliated with

Also associated with

No associations

Rating

Observations of hysteresis in solar cycle variations among seven solar activity indicators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of hysteresis in solar cycle variations among seven solar activity indicators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of hysteresis in solar cycle variations among seven solar activity indicators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1587687